X by 2 minus and y/ 3 equal to -1 and x/5 -y /4 equal to -7/10 by elimination method
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elimination method
- (X/2-Y/3=-1)1/5
- (X/5-Y/4=-7/10)1/2
X/10-Y/15=-1/5
X/10-Y/8 =-7/20
=Y/8(15)-Y/15(8)=7/20-1/5
=15Y-8Y/120=3/20
=7Y/120=3/20
=Y=18/7=(1).
from (1),
= X/2-Y/3=-1
=X/2-(18/7)/3=-7/10
=X/2=18/21-7/10
=X/2=180-147/21
=X/2=33/21
=X=66/7
=X=22/7
;X=22/7,Y=18/7
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